Improvement in boiler or other furnaces



dettati tant Letters .Patent No. 97,296, dated November 30, 1869.

IMPROVEMENT IN BOILER OR O'IIHIl-IRl FURNACES.

The Schedule referred to in these Letters Patent and making part of the same.

' To all persons to whom these presents lnut-y come:

Be it known that I, MARCUS L. Hon'rox, of Windsor, in the county of W'iudsor, and State of Vermont, have invented a new and useful Improvementin Furnaces forthe Combustion oi Fuel; and I do hereby declare the same to be fully described in the following specification, and represented in theaccompanying drawings, of which- Figure l is a horizontal section of my improved furnace, such sect-ion being taken through the grate.

Figure 2 is a longitudinal sect-ion;

Figure 3, a transverse section; and

Figure 4, a front elevation of such furnace.

Figure 5 is a rear view oi one of its tire-proof linings or walls.

On February 18, A. D. 1868, Letters Iatent No. 74,536, were granted to me for an improvcnn-mt in furnaces. The furnacel shown in such patenthas a rotary grate, but in my present furnace I have stationary gratos, having tubular bars arranged parallel, and having their ends open, and lateral ducts to open from oue'to theA next of such tubular hars.

.I also have tenon and socketbranch pipes to each longitudinall tubular grate-bar. Y

Iiurthermore, I `have a divisional chamber between Ithe two grates, and underneath the central air-discharging partition, which separates the.fire-chamber, such divisional chamber being closed at its front end, and made to open at its rear into the chamber or space which extends underneath the` side and hack walls of the furnace.

A A denote a furnace or chamber of combustion, divided along its middle by a wall or fire-brick partition, B, which has a series ot parallel longitudinal channels, a c a a, made through it, horizontally.

lt also has a series of channels, b l) 'b b, made vcrtically in it, and from the upper horizontal channel down to the bottom ofthe partition, and crijissing and opening into the other horizontal channels.

Furthermore, numerous holes or cducts, c e, lead in opposite directions out ofench ot' the said horizontal channels At theirl lower ends, thc vertical channels open into a long chamber, C, which is closed in front and open at its rear, and is arranged between two grates, I) D, disposed at the lower part of the lire-place.

Below the said grates audthe chamber (i, is the ash-chamber E.

Direct-ly over the ash-chamber, and in iiont ofthe grates, is an airchannel or space, F, into which the horizontal bars of the grates, at their iront ends, open.

The space F. is entirely separate from another chamber or space, G, which surrounds the ash-cham-` ber on its sides and back, extends up to a level with which may arise therefrom.

the upper surfaces of the grates, and is arranged unside-walls or lining H I I of more or less, as circumstances may require.

lf`urthermore, there are two door-ways or mouths, g 11, to the tire-place, each being provided with a door, It.

' Each of the gratos is composed of a series of long tubes, i yi i, arrangedparallel to one another.

Each of such tubes has tubular male and female branches, 7.' Z, projecting i'roni its opposite sides, and opening out oi' it, each branch on one sidebeingjustlong enough to receive and lit to the otheron the opposite side, the same beingl so that 'the branches ot' one tube maybe extended into those ot' the next one, as a tenori fits into a mortise. p

The middle chamber or 4i-luunml (1 is also provided with such female branches m, projecting from itin opposite directions, to receive the male branches ot' the next adjacent grate-hars or pipes, and so that they may open directly into the :said chamber.

With my furnace, so made, fuel may be burned on either-'or both the grates, as circumstances may require. Y

The air received into the chamber or conduit I", will pass through the 'grate-bars, and into the cham- 'ber or space about the ash-chamber,thence it will tlow into the chamber C. From the said chamber C, and the said space about the ash-chamber, such air will pass up into the partition, and the side and back walls or linings ofthe fire-place, and from thence will bc discharged into the fuel, and the liame and smoke In its passage through the grates, and about the sides of the ash-chamber, and up into and' through the partition, and linings, the air will become heated, andl in this state Vwill greatly promote combustion of' theluel and the gaseous products thereof'.

I would remark, that in the furnace, as represented in my said. patent No. 74,5%1 have exhibited tire brick or tireclay linings, containing vertical and hori,

zontal pipes, ot' metal; but in my present furnace, the

linings are wit-hout any such metallic pipes, but are simply channelled, both horizontally and vertically', the side and end linings being inadewith the channels in their rear falls.

The dispensing with the metallic pipes renders the linings not only cheaper, but better, as they are not liable to be cracked in consequence of being expanded or contracted, on the iron pipes, by the heat, or by the pipes being contracted or expanded Within them.

Now,.I herein make no claim to making the 'lining of a fire-place with vertical channels, only opening into the Iire-place; nor do I herein claim the combination and arrangementof the iron pipes, both holizontal and vert-ical, with a re-brick lining moulded on them.

I make no claim to the introduction of air into a hollow grate, and thence int-o a chamber about the ash-chamber, and next into and through channelled linings of a iireplace, and from thence into the fireplace, oifuelchamber thereof; but

ranged as specified.

MARCUS L. HORTON. Witnesses:

J. B. FARNSWORTH, RIPLEY CLUST. 

